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引进反照率概念,跟踪中子在堆腔两个壁面之间的随机游动,从而大大提高了计算效率。用这个方法计算了一个沸水堆堆腔中快中子通量和快中子剂量率的轴向相对分布。计算结果与国外二维S_N(DOT-Ⅲ)方法的计算结果基本符合。
The concept of albedo is introduced to track the random walk of neutrons between two walls in the cavity, which greatly improves the computational efficiency. Using this method, the axial relative distribution of fast neutron flux and fast neutron dose rate in a boiling water reactor stack was calculated. The calculated results are in good agreement with the calculated results of two-dimensional S_N (DOT-Ⅲ) method in foreign countries.